chore(KFLUXUI-256): support component.spec.containerImage as latestImage

[testcara]

The integration service recently migrated from using the component's spec.containerImage field to store the latest image to using the component's status.lastPromotedImage field.

The patch support the component.spec.containerImage as the latestImage when it's valid.

[codecov]

Codecov Report

Attention: Patch coverage is 95.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 80.11%. Comparing base (7c5807c) to head (5d40f39).
Report is 32 commits behind head on main.

Files with missing lines	Patch %	Lines
...ponents/ComponentDetails/tabs/ComponentDetails.tsx	50.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #67      +/-   ##
==========================================
+ Coverage   80.01%   80.11%   +0.10%     
==========================================
  Files         569      570       +1     
  Lines       21379    21452      +73     
  Branches     5294     5050     -244     
==========================================
+ Hits        17107    17187      +80     
+ Misses       4247     4241       -6     
+ Partials       25       24       -1     

Flag	Coverage Δ
unittests	80.11% <95.00%> (+0.10%)	⬆️

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[sahil143]

This change should be backward compatible. Right now I have a component that doesn't have any status. We should check for lastPromotedImage first if that doesn't exist use the spec.containerImage.